// #pragma once
// #include <iostream>
// #include <string>
// #include <sys/types.h>
// #include <sys/socket.h>
// #include <netinet/in.h>
// #include <arpa/inet.h>
// #include <cstring>
// #include <unistd.h>
// #include <sys/wait.h>
// #include <pthread.h>
// #include <functional>
// #include "InetAddr.hpp"
// #include "Log.hpp"

// // 模板方法类模式
// namespace socket_ns
// {
//     class Socket;
//     const static int gbacklog = 8;
//     using socket_sptr = std::shared_ptr<Socket>;

//     enum
//     {
//         SOCKET_ERROR = 1,
//         BIND_ERROR,
//         LISTEN_ERROR,
//         USAGE_ERROR
//     };

//     // class Socket;
//     // std::unique_ptr<Socket> listensock = std::make_unique<TcpSocket>();
//     // listensock->BuildListenSocket();

//     // std::unique_ptr<Socket> clientsock = std::make_unique<TcpSocket>();
//     // clientsock->BuildClientSocket();

//     class Socket
//     {
//     public:
//         virtual void CreatSocketOrDie() = 0;
//         virtual void BindSocketOrDie(InetAddr &addr) = 0;
//         virtual void ListenSocketOrDie() = 0;
//         virtual socket_sptr Accepter(InetAddr *addr) = 0;
//         virtual bool Connetcor(InetAddr &addr) = 0;
//         virtual int Sockfd() = 0;
//         virtual int Recv(std::string *out) = 0;
//         virtual int Send(const std::string &in) = 0;

//     public:
//         void BuildListenSocket(InetAddr &addr)
//         {
//             CreatSocketOrDie();
//             BindSocketOrDie(addr);
//             ListenSocketOrDie();
//         }
//         bool BuildClientSocket(InetAddr &addr)
//         {
//             CreatSocketOrDie();
//             return Connetcor(addr);
//         }

//     private:
//     };

//     class TcpSocket : public Socket
//     {
//     public:
//         TcpSocket(int fd = -1) : _socket(fd)
//         {
//         }
//         void CreatSocketOrDie() override
//         {
//             _socket = ::socket(AF_INET, SOCK_STREAM, 0);
//             if (_socket < 0)
//             {
//                 LOG(FATAL, "sockfd create error");
//                 exit(SOCKET_ERROR);
//             }
//             LOG(DEBUG, "sockd cretae success, sockfd is: %d\n", _socket);
//         }

//         void BindSocketOrDie(InetAddr &addr) override
//         {
//             // 2.bind
//             struct sockaddr_in local;
//             memset(&local, 0, sizeof(local));
//             local.sin_family = AF_INET;
//             local.sin_port = htons(addr.PORT());
//             local.sin_addr.s_addr = inet_addr(addr.IP().c_str());

//             int n = bind(_socket, (struct sockaddr *)&local, sizeof(local));
//             if (n < 0)
//             {
//                 LOG(FATAL, "bind error\n");
//                 exit(BIND_ERROR);
//             }
//             LOG(DEBUG, "bind cretae success, sockfd is: %d\n", _socket);
//         }

//         void ListenSocketOrDie() override
//         {

//             int n = ::listen(_socket, gbacklog);
//             if (n < 0)
//             {
//                 LOG(FATAL, "listen error\n");
//                 exit(LISTEN_ERROR);
//             }

//             LOG(DEBUG, "listen sockd success, sockfd is: %d\n", _socket);
//         }

//         virtual socket_sptr Accepter(InetAddr *addr) override
//         {
//             struct sockaddr_in peer;
//             socklen_t len = sizeof(peer);
//             int sockfd = ::accept(_socket, (struct sockaddr *)&peer, &len);
//             if (sockfd < 0)
//             {
//                 LOG(WARNING, "accept error\n");
//                 return nullptr;
//             }
//             *addr = peer;
//             socket_sptr sock = std::make_shared<TcpSocket>(_socket);
//             return sock;
//         }

//         virtual bool Connetcor(InetAddr &addr) override
//         {
//             struct sockaddr_in server;
//             memset(&server, 0, sizeof(server));
//             server.sin_family = AF_INET;
//             server.sin_addr.s_addr = inet_addr(addr.IP().c_str());
//             server.sin_port = htons(addr.PORT());
//             int n = connect(_socket, (struct sockaddr *)&server, sizeof(server));
//             if (n < 0)
//             {
//                 std::cerr << "connect error" << std::endl;
//                 return false;
//             }
//             return true;
//         }

//         int Sockfd() override
//         {
//             return _socket;
//         }

//         int Recv(std::string *out) override
//         {
//             char inbuffer[1024];
//             ssize_t n = ::recv(_socket, inbuffer, sizeof(inbuffer) - 1, 0);
//             if (n > 0)
//             {
//                 inbuffer[n] = 0;
//                 *out += inbuffer;
//             }

//             if(n < 0)//DEbug
//             {
//                 LOG(FATAL,"RRRRRRRRRRRRRRRRRRRRR\n");
//             }

//             return n;
//         }
//         int Send(const std::string &in) override
//         {
//             int n = ::send(_socket, in.c_str(), in.size(), 0);
//             if(n < 0)
//             {
//                  LOG(DEBUG,"SSSSSSSSSSSSSSSSSSSSSSSSSSS\n");
//             }
//             return n;
//         }

//     private:
//         int _socket;
//     };

// }

#include <iostream>
#include <string>
#include <functional>
#include <sys/types.h> /* See NOTES */
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <cstring>
#include <pthread.h>
#include <sys/types.h>
#include <memory>
#include "InetAddr.hpp"
#include "Log.hpp"

// 模版方法模式
namespace socket_ns
{
    class Socket;
    const static int gbacklog = 8;
    using socket_sptr = std::shared_ptr<Socket>;

    enum
    {
        SOCKET_ERROR = 1,
        BIND_ERROR,
        LISTEN_ERROR,
        USAGE_ERROR
    };

    // std::unique_ptr<Socket> listensock = std::make_unique<TcpSocket>();
    // listensock->BuildListenSocket();

    // std::unique_ptr<Socket> clientsock = std::make_unique<TcpSocket>();
    // clientsock->BuildClientSocket();

    // clientsock->send();
    // clientsock->Recv();

    class Socket
    {
    public:
        virtual void CreateSocketOrDie() = 0;
        virtual void BindSocketOrDie(InetAddr &addr) = 0;
        virtual void ListenSocketOrDie() = 0;
        virtual socket_sptr Accepter(InetAddr *addr) = 0;
        virtual bool Connetcor(InetAddr &addr) = 0;
        virtual int SockFd() = 0;
        virtual int Recv(std::string *out) = 0;
        virtual int Send(const std::string &in) = 0;

        // virtual void Recv() = 0;
        // virtual void Send() = 0;
        // virtual void other() = 0;

    public:
        void BuildListenSocket(InetAddr &addr)
        {
            CreateSocketOrDie();
            BindSocketOrDie(addr);
            ListenSocketOrDie();
        }
        bool BuildClientSocket(InetAddr &addr)
        {
            CreateSocketOrDie();
            return Connetcor(addr);
        }
        // void BuildUdpSocket()
        // {
        //     CreateSocketOrDie();
        //     BindSocketOrDie();
        // }
    };

    class TcpSocket : public Socket
    {
    public:
        TcpSocket(int fd = -1) : _sockfd(fd)
        {
        }
        void CreateSocketOrDie() override
        {
            // 1. 创建流式套接字
            _sockfd = ::socket(AF_INET, SOCK_STREAM, 0);
            if (_sockfd < 0)
            {
                LOG(FATAL, "socket error");
                exit(SOCKET_ERROR);
            }
            LOG(DEBUG, "socket create success, sockfd is : %d\n", _sockfd);
        }
        void BindSocketOrDie(InetAddr &addr) override
        {
            // 2. bind
            struct sockaddr_in local;
            memset(&local, 0, sizeof(local));
            local.sin_family = AF_INET;
            local.sin_port = htons(addr.PORT());
            local.sin_addr.s_addr = inet_addr(addr.IP().c_str());

            int n = ::bind(_sockfd, (struct sockaddr *)&local, sizeof(local));
            if (n < 0)
            {
                LOG(FATAL, "bind error");
                exit(BIND_ERROR);
            }
            LOG(DEBUG, "bind success, sockfd is : %d\n", _sockfd);
        }
        void ListenSocketOrDie() override
        {
            int n = ::listen(_sockfd, gbacklog);
            if (n < 0)
            {
                LOG(FATAL, "listen error");
                exit(LISTEN_ERROR);
            }
            LOG(DEBUG, "listen success, sockfd is : %d\n", _sockfd);
        }
        socket_sptr Accepter(InetAddr *addr) override
        {
            struct sockaddr_in peer;
            socklen_t len = sizeof(peer);
            int sockfd = ::accept(_sockfd, (struct sockaddr *)&peer, &len);
            if (sockfd < 0)
            {
                LOG(WARNING, "accept error\n");
                return nullptr;
            }
            *addr = peer;
            socket_sptr sock = std::make_shared<TcpSocket>(sockfd);
            return sock;
        }
        virtual bool Connetcor(InetAddr &addr)
        {
            // tcp client 要bind，不要显示的bind.
            struct sockaddr_in server;
            // 构建目标主机的socket信息
            memset(&server, 0, sizeof(server));
            server.sin_family = AF_INET;
            server.sin_port = htons(addr.PORT());
            server.sin_addr.s_addr = inet_addr(addr.IP().c_str());

            int n = connect(_sockfd, (struct sockaddr *)&server, sizeof(server));
            if (n < 0)
            {
                std::cerr << "connect error" << std::endl;
                return false;
            }
            return true;
        }
        int Recv(std::string *out) override
        {
            char inbuffer[1024];
            ssize_t n = ::recv(_sockfd, inbuffer, sizeof(inbuffer) - 1, 0);
            if (n > 0)
            {
                inbuffer[n] = 0;
                *out += inbuffer; // ??? +=
                LOG(DEBUG, "RRREEEEEEEEEEEEEEEEEEEERRRRR\n");
            }
            if (n < 0)
            {
                LOG(DEBUG, "RRRRRRRRRRRRRRRRRRRRRRRRRRRRR\n");
            }
            return n;
        }
        int Send(const std::string &in) override
        {
            int n = ::write(_sockfd, in.c_str(), in.size());
            if (n > 0)
            {
                LOG(DEBUG, "SSSSSUUUUUUUUUUUUUUUUUSSSSSSS\n");
            }
            if (n < 0)
            {
                LOG(DEBUG, "SSSSSSSSSSSSSSSSSSSSSSSSSSS\n");
            }
            return n;
        }
        int SockFd() override
        {
            return _sockfd;
        }

    private:
        int _sockfd;
    };

    // class SocketFactor
    // {
    // public:
    //     void Build
    // }
} // namespace socket_ns